I like sweet-vapes. Don't get me wrong. But I have a problem with some of their suggestions. First off, the size of the battery doesn't have anything to do with how a SR or LR Vision works or whether it will make your juice taste burnt or not. That is a function of voltage, not battery size.
Second, the LR Vision is better on a kgo. No question. People are constantly complaining that the SR Visions give out "muted" flavor or weak vapor with a kGo after the first hour or two when the voltage stabilizes at 3.7 or 3.8. When the kgo first comes off charge, it's 4.1V and a SR works o.k. But it's downhill from there.
If you want to taste juice, don't use a cartomizer. Use an atomizer instead. Get an atomizer or two and some drip tips. You drop a few drops of the juice right through the drip tip, onto the coil of the atomizer. That will give you the best, cleanest flavor without wasting a cartomizer on a juice you might not like anyway. Sweet-Vapes has debridged atomizers that are good for "dripping", which is what you'll be doing.
The best resistance for a kGo is between 1.7 and 2.5ohms. The lower the number, the warmer the vapor will be. If you like very delicate fruity flavors, tend toward the high side. If you like heavier, darker juice like coffee or tobacco, go toward the lower end of that scale.
LR and SR and HR all have different definitions, depending on what vendor is talking.
Below 2.5ohms is generally considered LR
2.5-3ohms is SR
over 3ohms is HR.
If you are getting cartomizers, I'd recommend a box of 1.7ohm Smoketech Ressurectors, a box of 2ohm Boge and a box of 2.5ohm Boge if you can find them.
The best cartomizer deals are CrystalClearVaping.com with a 3box/$20 shipped "bundle, and Surevapes.com with a 5box/$23 shipped deal. You can't mix and match them on Surevapes though.
Best deal I've seen on Vision Clearomizers are the CE4+ at Discountvapers.com. Get the LR, 2.1-2.4ohm variety.
http://www.discountvapers.com/vision-ego-ce4-clearomizer-v2-lr/
The CE4+ is the newer version. it's also called the eGo Vision Clearomizer V2. Also the V2 Stardust.
Some vendors are still selling the V1 and have marked them down for clearance. So the prices might look the same as Discountvapers.
Make sure you get the new version, not the old ones. The new versions have longer wicks and the plastic is supposed to be more crack resistant.
